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Math Help - help bivariate

  1. #1
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    help bivariate

    Five observations of bivariate data produce the following results, denoted as (xi, yi)for i =1, 2, 3, 4, 5.

    (13, 2.7) (13, 4.0) (18, 2.8) (23, 3.3) (23, 2.2)

    [Σ x = 90, Σ y = 15.0, Σ x2 = 1720, Σ y2 = 46.86, Σ xy = 264.0.]

    The regression line of y on x has gradient −0.06,
    and its equation is y= 4.08 - 0.06x


    The numbers e1, e2, e3, e4, e5 are defined by
    ei = a +bxi −yi for i = 1, 2, 3, 4, 5.

    The values of e1, e2 and e3 are 0.6, −0.7 and 0.2 respectively. Calculate the values of e4 and e5.


    thanks
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  2. #2
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    Quote Originally Posted by gracey View Post
    Five observations of bivariate data produce the following results, denoted as (xi, yi)for i =1, 2, 3, 4, 5.

    (13, 2.7) (13, 4.0) (18, 2.8) (23, 3.3) (23, 2.2)

    [Σ x = 90, Σ y = 15.0, Σ x2 = 1720, Σ y2 = 46.86, Σ xy = 264.0.]

    The regression line of y on x has gradient −0.06,
    and its equation is y= 4.08 - 0.06x


    The numbers e1, e2, e3, e4, e5 are defined by
    ei = a +bxi −yi for i = 1, 2, 3, 4, 5.

    The values of e1, e2 and e3 are 0.6, −0.7 and 0.2 respectively. Calculate the values of e4 and e5.


    thanks
    ei = (4.08 - 0.06 xi) - yi.

    Just substitute (23, 3.3) and (23, 2.2) to get e4 and e5.
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  3. #3
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    thank you sooo much you are absolutely amazing.
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  4. #4
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    Quote Originally Posted by gracey View Post
    thank you sooo much you are absolutely amazing.
    Fantastic, actually. My brother is Amazing .

    ps. you're welcome
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